Roland created NUTCH-1538:
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Summary: tuning of loaded fields during fetcherJob start-up
Key: NUTCH-1538
URL: https://issues.apache.org/jira/browse/NUTCH-1538
Project: Nutch
Issue Type: Improvement
Components: fetcher
Affects Versions: 2.1
Environment: nutch 2.1 / cassandra 1.2.1 / gora-cassandra 0.2 /
gora-core 0.2.1
running fetch with parse=true
Reporter: Roland
Main problem is, nutch is loading nearly every row & column from DB during
startup of a fetcherJob when fetcher.parse=true.
A parserJob needs e.g. the CONTENT field from db, to parse.
The fetcherJob adds all fields of the parserJob to it's needed fields, if
running with fetcher.parse=true. [FetcherJob.getFields()]
If the nutch configuration saves all fetched data to DB
(fetcher.store.content=true) you'll end up loading GBs of unused content during
fetcherJob start-up.
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